I like scrambled eggs with spam and mexicorn on boat trips. Scramble the eggs in the pot, add the canned corn and spam in time for them to get heated through (you can leave out or substitute for the spam if it's not to your taste). Simple, filling, one pot. Eggs aren't the easiest thing for provisioning for a long trip, though.

Another good one is Zatarain's mixes. Black beans and rice, or the jambalaya mix. Comes in a box, cooks in one pot. Slice some kielbasa and add to the pot, and you've got a warm filling meal.